Method of preparing pharmaceutical artemisia extract and apparatus for electrical moxibustion using the extract

ABSTRACT

The present invention relates to a method making moxa extract formulations in a simple manner and an apparatus for operating moxibustion remedy in a convenient manner. The present invention provides a method of preparing the pharmaceutical moxa extract formulations comprising the steps of extracting a moxa-methanol extract; extracting a moxa-dichloromethane fraction; extracting a moxa-ethylacetate fraction; and making the moxa extract formulation, and an apparatus for electrical moxibustion which comprises a heating unit for generating heat at a certain temperature, a fixing unit for fixing and supporting the heating unit and indirectly transferring beat from the heating unit to the skin, an adiabatic unit for preventing heat from being scattered by forming a housing surrounding all upper and sides of the heating unit and the fixing unit, and a removable moxibustion pad attached and detached to the fixing unit.

This application is a Divisional of application Ser. No. 09/401,733, filed Sep. 23, 1999, which application(s) are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Technical field

The present invention relates to a method of preparing pharmaceutical moxa extract formulation and a skin-electrode type electrical moxibustion apparatus for moxibustion treatment with use of the pharmaceutical moxa extract formulation, and more particularly to a method of preparing pharmaceutical moxa extract formulation which is prepared by extracting pharmacological components from the moxa, and to an apparatus for electrical moxibustion which can easily operate onto the affected part with use of the pharmaceutical moxa extract formation.

2. Description of the Prior Art

Conventional moxibustion remedies using moxa are classified into direct and indirect manners. However, such manners have troubles in that smoke is generated when burning the moxa lump and a user should light the moxa lump whenever operating the moxibustion. In addition, such manners can cause risks of burn in case that the moxa lump falls during the operation.

In addition, ashes on the afflicted part from the burning moxa lump should be removed after operation and an operator should look after the patient in a near position through the operation, which requires the operator to spend much time, so to cause higher expenses.

In order to overcome such problems, recently, technical development for pharmaceutical moxa extract formulations which can be easily and hygienically used becomes required for the moxibustion treatment instead of the moxa lump.

SUMMARY OF THE INVENTION

Therefore, an object of the present invention is to provide a method of preparing pharmaceutical moxa extract formulation having crude drug components of the moxa by extracting moxa extract from the moxa with use of simple solvent treatment process.

In addition, another object of the present invention is to provide an electrical moxibustion apparatus in which, after injecting the pharmaceutical moxa extract formulation, extracted and prepared from the moxa, into a liquid permeable membrane, a moxibustion pad can retain the liquid permeable membrane having the pharmaceutical moxa extract formulation, and in which moxibustion treatment can be easily operated by attaching the skin-electrode type electrical moxibustion apparatus on the affected parts.

Further, still another object of the present invention is to provide an electrical moxibustion apparatus in which the pharmaceutical moxa extract formulation, extracted and prepared from the moxa, is applied on the affected parts and then heated indirectly by an electrical heater such that crude drug components of the moxa can be naturally permeated into the skin.

For obtaining the objects, the first embodiment of the present invention provides a method of preparing pharmaceutical moxa extract formulation, comprising the steps of: extracting moxa-methanol extract by extracting from dried young leaves of the Artemisia several times with use of methanol as a solvent, and condensing the extract; and preparing pharmaceutical moxa extract formulation by diluting or processing the moxa-methanol extract with a specific solvent.

In order to fulfill the above objects, the second embodiment of the present invention provides a method of preparing pharmaceutical moxa extract formulation, comprising the steps of: extracting moxa-methanol extract by extracting from dried young leaves of the Artemisia several times with use of methanol as a solvent, and condensing the extract; extracting moxa-ethyl acetate fraction by suspending the moxa-methanol extract in water, then mixing the suspended extract with ethyl acetate, and then distilling the mixture with use of a fractional distiller; and preparing pharmaceutical moxa extract formulation by diluting or processing the extracted moxa-ethyl acetate fraction with a specific solvent.

For achieving the objects, the third embodiment of the present invention provides method of preparing pharmaceutical moxa extract formulation, comprising the steps of: extracting moxa-methanol extract by extracting from dried young leaves of the Artemisia several times with use of methanol as a solvent, and condensing the extract; extracting moxa-dichloromethane fraction, separated in a lower portion of a fractional distiller, by suspending the moxa-methanol extract in water, then mixing the suspended extract with dichloromethane, and then distilling the mixture with use of the fractional distiller; extracting moxa-ethyl acetate fraction, separated in an upper portion of the fractional distiller, by mixing the residuals, after extracting the moxa-dichloromethane fraction, with ethyl acetate, and then distilling the mixture with use of the fractional distiller; and preparing pharmaceutical moxa extract formulation by mixing and condensing the extracted moxa-dichloromethane fraction and moxa-ethyl acetate fraction, condensing the mixture and then diluting or processing the condensed mixture with a specific solvent.

In each embodiment, the method of preparing pharmaceutical moxa extract formulation further comprises at least one of medicinal stuff selected from the group consisting of cinnamon cortex, dried ginger, clove, saussurea root, Korean aralia root, asarum, Angelicae Dahuricae root, orpiment, atractylis, myrrh, frankincense, akene, garlic, beeswax, and sulfur, other than dried young leaves of Artemisia in said step of extracting moxa-methanol extract.

In addition, moxa extract tincture formulation can be made by evaporating the moxa-methanol extract, moxa-ethyl acetate fraction, or the mixture of the moxa-dichloromethane and the moxa-ethyl acetate fraction, and then diluting the dried with use of 2-5 times amount of ethanol relative to the weight of the dried.

On the other hand, moxa extract lotion formulation can be made by evaporating and then powdering the moxa-methanol extract, moxa ethyl acetate fraction, or the mixture of the Artemisia dichloromethane and the moxa-ethyl acetate fraction, and then mixing the powder with diluent such as vaseline, liquid paraffin, isostearic acid, stearyl alcohol, myristyl alcohol, and polyvinyl alcohol block copolymer.

In order to fulfill other objects of the present invention, another embodiment provides an apparatus for electrical moxibustion comprising: heating means for generating heat at a certain temperature when power is applied thereto; fixing means for fixing and supporting the heating means, the fixing means having first heat-transferring media for transferring heat from the heating means to skin indirectly; adiabatic means for preventing heat of the heating means from being dispersed to upper and side directions, and adiabatic means forming a housing surrounding all upper and side portions of the heating means and the fixing means; and moxibustion pad means removably mounted to the fixing means, the pad means being indirectly heated by heat transferred from the hearing means through the first heat-transferring media, the pad means having a synthetic resin pad in a certain area for covering the affected part and second heat-transferring media which is removably fixed to the first heat-transferring media.

In order to achieve other objects, still another embodiment of the present invention provides an apparatus for electrical moxibustion comprising: heating means having two electrode terminals, which generates heat at a certain temperature when power is applied from the terminals, fixing means forming a case having a seating groove opened upwardly for seating the heating means thereon, the fixing means fixing and supporting the heating means safely with use of the case, the fixing means transferring heat from the heating means to skin indirectly, wherein the fixing means is formed by molding insulating materials with coating inside of the seating groove with insulating materials and seating the heating means upon the seating groove in order to be insulated from the heating means; and adiabatic means for preventing heat of the heating means from being dispersed to upper and side directions, the adiabatic means forming a housing surrounding all upper and side portions of the heating means and the fixing means.

In each embodiment of the apparatus for electrical moxibustion, a positive temperature coefficient (PTC) resistor, a conductive polymer heater made by mixing an electrical conductor such as carbon black into polymeric materials such as polyethylene or rubber, or a nichrome wire heater can be used.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings, in which like components are referred to by like reference numerals. In the drawings:

FIG. 1 is a flow chart for illustrating the first embodiment of the method of preparing pharmaceutical moxa extract formulations according to the present invention;

FIG. 2 is a flow chart for illustrating the second embodiment of the method of preparing pharmaceutical moxa extract formulations according to the present invention;

FIG. 3 is a flow chart for illustrating the third embodiment of the method of preparing pharmaceutical moxa extract formulations according to the present invention;

FIG. 4 is an exploded perspective view showing the first embodiment of an electrical moxibustion apparatus according to the present invention;

FIG. 5 is a perspective view for showing assembly state of FIG. 4;

FIG. 6 is an enlarged section view taken along the line A—A′ of FIG. 5;

FIG. 7 is an exploded perspective view showing the second embodiment of the electrical moxibustion apparatus according to the present invention;

FIGS. 8 to 10 are perspective views for sequentially showing assembly process of FIG. 7, respectively; and

FIG. 11 is an enlarged section view taken along the line B—B′ of FIG. 10.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Hereinafter, a method of preparing pharmaceutical moxa extract formulation and an apparatus for electrical moxibustion according to each preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart showing one embodiment of the method of preparing pharmaceutical moxa extract formulations according to the present invention, which is composed of the steps of extracting moxa-methanol extract S101, and preparing the pharmaceutical moxa extract formulations S102-105.

As shown in the figure, the step of extracting the moxa-methanol extract S101 obtains the moxa-methanol extract by putting dried young leaves of the Artemisia and methanol as an organic solvent, extracting from the dried young leaves of Artemisia with methanol, and then condensing the extract.

The steps of preparing the pharmaceutical moxa extract tincture formulation S102, S103 may prepare the pharmaceutical moxa extract tincture formulation from the moxa-methanol extract. At this time, the obtained pharmaceutical moxa extract formulation is in the form of having color but not leaving remnants after applied on the skin. Particularly, after evaporating the moxa-methanol extract S102, moxa extract tincture formulation, which is possibly applied on the skin in a liquid state, can be made by diluting the dried moxa-methanol extract with use of 2-5 times amount of ethanol relative to the weight of the dried moxa-methanol extract S103.

On the other hand, the steps of preparing the pharmaceutical moxa extract lotion formulation S104, S105 may make moxa extract lotion formulation, which is possibly applied on the skin, by evaporating the extracted moxa-methanol extract, then powdering the dried moxa-methanol extract S104, and mixing the powder with diluent S105.

FIG. 2 is a flow chart showing another embodiment of the method of preparing pharmaceutical moxa extract formulations according to the present invention, which includes the steps of extracting moxa-methanol extract S201, extracting moxa-ethyl acetate fraction S202, and preparing pharmaceutical moxa extract formulations S203-S206.

When compared with FIG. 1, it can be easily seen that this embodiment further includes the step S202 of extracting the moxa-ethyl acetate fraction by suspending the moxa-methanol extract, extracted from the step of extracting the moxa-methanol extract S201, in water, then mixing the suspended extract with ethyl acetate, and then distilling the mixture with use of a fractional distiller. In the step of extracting moxa-ethyl acetate fraction S202, when the ethyl acetate mixture are distilled in the fractional distiller, phenolic compounds and essential oil of the moxa can be simultaneously respectively extracted in upper and lower portions of the fractional distiller due to the difference of specific gravity among the mixed components.

The steps of preparing pharmaceutical moxa extract formulations S203-S206 can obtain the pharmaceutical moxa extract formulations from the extracted fraction in S202. The pharmaceutical moxa extract formulations obtained in the steps S203-S206 are also in the form of having color but not leaving remnants after applied on the skin.

Particularly, in the steps S203, S204, after evaporating the moxa-ethyl acetate fraction S203, the moxa extract tincture formulation, which is possibly applied on the skin in a liquid type, can be made by diluting the dried moxa-ethyl acetate fraction with use of 2-5 times amount of ethanol relative to the weight of the dried moxa-ethyl acetate fraction S204.

In the steps of preparing pharmaceutical moxa extract lotion formulation S205, S206, the moxa-ethyl acetate fraction is evaporated and then powdered into powder S205, and the diluent is mixed with the powder S206 so to make the moxa-extract lotion which is possibly applied on the skin.

FIG. 3 is a flow chart showing another embodiment of the method of preparing pharmaceutical moxa extract formulations according to the present invention, which includes the steps of extracting the moxa-methanol extract S301, extracting moxa-dichloromethane fraction S302, extracting the moxa-ethyl acetate fraction S303, and preparing the pharmaceutical moxa extract formulations S304-S308.

When compared with FIG. 2, it can be easily seen that the embodiment of FIG. 3 further includes the step of extracting the moxa-dichloromethane fraction S302 by suspending the moxa-methanol extract, extracted in the step S301, in water, then mixing the suspended extract with dichloromethane, and then distilling the mixture with use of the fractional distiller. In the step of extracting the moxa-dichloromethane fraction S302, when distilling the dichloromethane mixture in the fractional distiller, the moxa-dichloromethane fraction containing cineol and fatty acid can be extracted in a lower portion of the fractional distiller due to the difference of specific gravity among the mixed components.

In the steps of preparing the pharmaceutical moxa extract formulations S304-S308, the extracted moxa-dichloromethane fraction and moxa-ethyl acetate fraction are mixed and condensed S304, and then the pharmaceutical moxa extract formulations can be obtained from the condensed mixture. The pharmaceutical moxa extract formulations obtained at this time are also in the form of having color but not leaving remnants after being applied on the skin.

Particularly, in the steps of preparing the pharmaceutical moxa extract tincture formulation S305, S306, after evaporating the condensed mixture of the moxa-dichloromethane fraction and the moxa-ethyl acetate fraction S305, the moxa-extract tincture, which is possibly applied on the skin in a liquid date, can be made by diluting the dried mixture with use of 2-5 times amount of ethanol relative to the weight of the dried mixture S306.

On the other hand, in the step of preparing the pharmaceutical moxa extract lotion formulation S307, S308, the moxa extract lotion formulation, which is possibly applied on the skin, can be made by evaporating the condensed mixture of the moxa-dichloromethane fraction and the moxa-ethyl acetate fraction, the powdering the dried mixture S307, and mixing the power with diluent S308.

In the process of extracting the moxa-methanol extract in FIG. 1 to FIG. 3, though not shown in the figures, the moxa-methanol extract can be extracted by putting and sealing dried young leaves of the Artemisia in methanol, then firstly extracting moxa-methanol extract after 24 hours at room temperature, putting and sealing the remaining dried young leaves of the Artemisia in methanol after extraction of the first moxa-methanol extract, then secondly extracting moxa-methanol extract after 24 hours at room temperature, putting and sealing the remaining dried young leaves of the Artemisia in methanol after extraction of the second moxa-methanol extract, then thirdly extracting moxa-methanol extract after 3 hours at 70-80° C., and then mixing and condensing all of the extracted moxa-methanol extract made previously at three times.

In addition, in the process of extracting the moxa-methanol extract, medicine-mixed moxa, made by mixing the dried young leaves of the Artemisia with little medicinal stuffs including at least one of cinnamon cortex, dried ginger, clove, saussurea root, Korean aralia root, asarum, Angelicae Dahuricae root, orpiment, atractylis, myrrh, frankincense, akene, garlic, beeswax, and sulfur, can be used in order to improve harmacological action of the moxa.

FIG. 4 is an exploded perspective view showing the first embodiment of the electrical moxibustion apparatus according to the present invention, FIG. 5 shows assembly state of FIG. 4, and FIG. 6 is an enlarged section view taken along the line A—A′ of FIG. 5.

As shown in the figures, the electrical moxibustion apparatus includes a power supply for supplying power from an external source, a heating unit for generating heat at a certain temperature when power is applied thereto, a heater fixing unit for fixing and supporting the heating unit, the heater fixing unit having first heat-transferring media for transferring heat from the heating unit to skin indirectly, an adiabatic unit for preventing heat of the heating unit from being dispersed to upper and side directions, the adiabatic unit forming a housing surrounding all upper and side portions of the heating unit and the heater fixing unit, and a moxibustion pad removably mounted to the heater fixing unit, the pad being directly heated by heat transferred from the heating unit through the first heat-transferring media, the pad having a synthetic resin pad in a certain area for covering the affected part and second heat-transferring media which is removably fixed to the first heat-transferring media.

For detailed description, the power supply includes a cable 3 and a power-connecting probe 4 for applying power from the external source, and two electrode terminals 2 a, 2 b connected through the probe and cable.

The heating unit includes a heating element 1 connected to upper and lower portions of the two electrode terminals 2 a, 2 b respectively for generating beat at constant temperature by using current from the electrode terminals. At this time, the heating element can be a ceramic resistance heater or a conductive polymer heater having a positive temperature coefficient (PTC). Such ceramic resistance heater can be made by mixing and sintering barium carbonate BaCO₃, strontium carbonate SrCO₃, yttrium oxide Y₂CO₃, titanium dioxide TiO₂ and silicon dioxide SiO₂, in which mixing proportions of barium carbonate BaCO₃, strontium carbonate SrCO₃, yttrium oxide Y₂CO₃, titanium dioxide TiO₂ and silicon dioxide SiO₂ can be adjusted to form (Ba_(0.8)Sr_(0.2))_(0.996)Y_(0.004)TiO₃+0.5_(wt)SiO₂. In addition, the conductive polymer heater can be made by mixing an electrical conductor such as carbon black into polymeric materials such as polyethylene or rubber. At this time, considering that electrical properties, heat temperature, and melting point are determined according to mixing proportion thereof, the conductive polymer heater can be preferably a resistor for regulating heat temperature by adjusting the mixing proportion.

The adiabatic unit forms a housing surrounding all upper and side portions of the heating element 1, and includes a case 7 having a cable guiding groove 7 a for fetching a cable connected to the heating element 1.

The heater fixing unit includes a first heat-transferring media 6 for transferring heat from the heating element 1 to the skin, and a fixing plate 5 for facilitating soldering in order to connect an external cable to the heating element 1. The first heat-transferring media 6 includes a first button contact 6 a formed on a center portion thereof for the purpose of attachment and detachment of the removable moxibustion pad, and the fixing plate 5 includes a through hole 5 a for easily fixing the first heat-transferring media 6 by guiding the first button contact 6 a. Also, the heating element 1 preferably includes a through hole 1 a for guiding the first bottom contact 6 a. Therefore, the first button contact 6 a is guided along the two through holes 5 a, 1 a so that the first heat-transferring media 6 can be sequentially installed to the fixing plate 5 and the heating element 1, then transferring heat from the heating element 1.

In addition, the removable moxibustion pad includes a synthetic resin pad 8 in the form of a sponge rubber plate having a certain contact area with the skin for covering the affected part for moxibustion, second heat-transferring media 9 removably fixed to the first heat-transferring media 6 through the synthetic resin pad 8 therebetween, and a liquid permeable membrane 10 attached to the second heat-transferring media 9, through which the pharmaceutical moxa extract formulation can be injected with use of sponge materials. The second heat-transferring media 9 includes second button contact 9 a formed on a center portion thereof so to be detachably attached to the first button contact 6 a of the first heat-transferring media 6, and a through hole 8 a is formed on a center portion of the synthetic resin pad 8 in order to guide the second button contact 9 a. Therefore, the second heat-transferring media 9 fixes the synthetic resin pad 8 by guided along the through hole 8 a of the synthetic resin pad 8, and is then combined to the first button contact 6 a of the first heat-transferring media 6 so that heat can be transferred to the second heat-transferring media 9.

Under the synthetic resin pad, an end-shielding groove 8 b is formed toward the skin such that the second heat-transferring media 9 and the liquid permeable membrane 10 can be interposed thereinto so to be inserted to a depth of surrounding upper and side portions of the liquid permeable membrane 10. Therefore, because the sponge rubber plate surrounds upper and rim of the second heat-transferring media 9 and the liquid permeable membrane 10, heat can be transferred throughout the whole synthetic resin pad, which enhances heat transfer.

In addition, the removable moxibustion pad inserts the liquid permeable membrane 10, made of a sponge membrane through which the pharmaceutical moxa extract formulation can be injected, into the end-shielding groove 8 b such that the liquid permeable membrane 10 can be indirectly heated. After that, when injecting the pharmaceutical moxa extract formulation into the liquid permeable membrane 10, moxibustion can be operated by the pharmaceutical moxa extract formulation. At this time, the removable moxibustion pad can be repeatedly used by injecting required amount of the pharmaceutical moxa extract formulation into the liquid permeable membrane 10, or can be disposable after first time use with use of the first and second button contacts 6 a, 9 a.

In the removable moxibustion pad, adhesive 11 (see FIG. 5) is also applied on a skin-contact surface of the synthetic resin pad in order to increase adhesion between the synthetic resin pad and the skin.

Moxibustion remedy using the electrical moxibustion apparatus constructed as above and the pharmaceutical moxa extract formulation prepared according to the present invention is as follows. At first, the second heat-transferring media 9 and the synthetic resin pad 8 are combined after guiding the second button contact 9 a of the second heat-transferring media 9 into the through hole 8 a of the synthetic resin pad 8. The liquid permeable membrane 10 is then attached to the second heat-transferring media 9. The adhesive 11 is then applied to rim of the contact area of the synthetic resin pad 8, then forming the removable moxibustion pad. After that, when injecting required amount of the pharmaceutical moxa extract formulation into the liquid permeable membrane 10, the liquid permeable membrane 10 keeps the liquid-phase pharmaceutical moxa extract formulation owing to its sponge materials. Then, when putting the removable moxibustion pad on the affected parts, the adhesive 11 becomes in contact with the skin and the synthetic resin pad 8 becomes fixed on the affected parts.

Combining the removable moxibustion pad and the heater fixing unit with use of each button contact 6 a, 9 a of the first and second heat-transferring media 6, 9 makes the electrical moxibustion apparatus assembled. After that, then applying power through the probe 4 of the apparatus, current flows in the heating element 1 through the two electrode terminals 2 a, 2 b in the apparatus, so to generate heat. With generating heat, the pharmaceutical moxa extract formulation injected in the liquid permeable membrane become melted such that melted moxa components can be permeated into the skin, which provides moxibustion effect. After that, the electrical moxibustion apparatus maintains the positive temperature coefficient (PTC) till a specific temperature, for example 100° C. At this time, the heating element 1 generates heat at a certain predetermined temperature according to mixing proportion of the compounded materials. Therefore, the pharmacological components of the moxa, applied on the skin, become permeated into skin tissues so to generate pharmacological action of the moxa and hyperthermia action, which makes the moxibustion treatment simple.

FIG. 7 is an exploded perspective view of the second embodiment of the electrical moxibustion apparatus according to the present invention, FIG. 8 to FIG. 10 are perspective views sequentially showing assembling process of FIG. 7, and FIG. 11 is an enlarged view taken long the line B—B′ in FIG. 10. As shown in the figures, the electrical moxibustion apparatus includes a power supply for supplying power from an external source, a heating unit having two electrode terminals, which generates heat at a certain temperature when power is applied through the terminals, a heater fixing unit, molded with insulating materials, having a case having a seating groove opened upwardly for seating the heating unit thereon in order to fix and support the heating unit safely with use of the case and transfer heat from the heating unit to skin indirectly, and an adiabatic unit for preventing heat of the heating unit from being dispersed to upper and side directions, the adiabatic unit forming a housing surrounding all upper and side portions of the heating unit and the heater fixing unit.

The power supply includes a cable 23 and a power-connecting probe 24 for applying power from the external source, and two electrode terminals 22 a, 22 b connected through the probe and cable.

The heating unit includes a PTC resistor 21 having the two electrode terminals 22 a, 23 b at upper and lower portions respectively for generating heat at constant temperature by using current from the electrode terminals.

The PTC resistor 21 can be made by mixing and sintering barium carbonate BaCO₃, strontium carbonate SrCO₃, yttrium oxide Y₂CO₃, titanium dioxide TiO₂ and silicon dioxide SiO₂, in which mixing proportions of barium carbonate BaCO₃, strontium carbonate SrCO₃, yttrium oxide Y₂C0 ₃, titanium dioxide TiO₂ and silicon dioxide SiO₂ can be adjusted to form (Ba_(0.8)Sr_(0.2))_(0.996)Y_(0.004)TiO₃+0.5_(wt)SiO₂. The PTC resistor 21 can regulate heat temperature by adjusting mole ratio of barium Ba and strontium Sr so as to form curie-temperature at a range of 40° C.-60° C. which is not harmful to human body in hyperthermia and moxibustion remedy. At this time, because moxibustion temperature required to body may be different according to diathesis of the person, the heat temperature is variable in such range.

Though not shown in the figures, the heating unit can include a nichrome wire heater instead of the PTC resistor. In this case, the heating unit may further include a switching unit for maintaining heating temperature in a certain range by intermitting current, supplied to the nichrome wire heater, according to a temperature of the nichrome wire heater.

The heater fixing unit includes a seating groove opened upwardly for seating the heating unit, and a case body for surrounding whole surface of the PTC resistor. The case body also has a cable guiding groove formed at a certain side thereof for fetching the cable connected to the PTC resistor. In the heater fixing unit, therefore, the seating groove and the case body constitute a case 25 with heat resistance materials which indirectly transfers heat from the PTC resistor to the skin by molding the surface of the PTC resistor with use of the insulating materials in form of seating the PTC resistor 21 on the case body and then surrounding the surface of the PTC resistor. The case body can be particularly made of heat resistance resin, impassive to heat, and coated with insulating materials such as silicon in order to insulate the skin from the resistor when the case body contacts with the skin. The case 25 also includes a detachable double-side adhesive tape applied on a skin-contact surface thereof in order to increase adhesion between the skin and a lower surface thereof. In addition, in order to broaden contact area between the lower surface and the skin, a brim 25 a can be formed along lower side verges of the case. Furthermore, in order to increase adhesion with the skin, the detachable double-side adhesive tape 27 b can also be attached on the brim 25 a. The heater fixing unit may also include an end-shielding groove (not indicated with numeral in the drawing) opened toward the skin on an opposite side to the seating groove of the case 25 with a certain depth in order to insert the pharmaceutical moxa extract formulation thereinto.

As an adiabatic means, a detachable holder 26 can be assembled and adhered onto the case 25 in form of surrounding all upper and side portions of the resistor 21 in order to prevent heat, generated from the resistor, from being dispersed to outside. The holder 26, used for increasing insulation with use of thin sponge materials, can include a brim 26 a formed along lower side verges thereof in order to broaden contact area with the skin. In addition, a detachable double-side adhesive tape 27 a can be adhered to the brim 26 a in order to increase adhesion with the skin.

In addition, though not shown in the figures, the electrical moxibustion apparatus of the present invention can be connected to a main body for regulating voltage applied to the apparatus. Besides, the main body may include a plurality of connecting terminals for connecting probes of a plurality of electrical moxibustion apparatuses such that many moxibustion apparatuses can be used at the same time. Furthermore, a connecting receptacle or a distribution box in order to increase number of the moxibustion apparatus used at the same time and expand radius of use.

The process of operating moxibustion remedy using the electrical moxibustion apparatus and the pharmaceutical moxa extract formulation is as follows. At first, an operator applies the pharmaceutical moxa extract formulation on the affected parts, and then puts the electrical moxibustion apparatus thereon, which makes the double-side adhesive tapes 27 a, 27 b of the electrical moxibustion apparatus contacted and fixed on the skin at the same time. Then, when connecting the apparatus to the power source through the probe 24, current flows in the PTC resistor 21 through the two electrode terminals 22 a, 22 b in the apparatus such that the PTC resistor generates heat. At this time, the PTC resistor 21 generates heat at a certain predetermined temperature according to mole ratio of the compounds. Therefore, crude drug components of the moxa applied on the skin penetrates the skin so to provide pharmacological action of the moxa, which makes the moxibustion remedy simple.

By using the present invention as described above, the moxibustion remedy can be easily operated by using a quite new manner which applies power using button contact with a lead wire of the heat generating unit after attaching the moxibustion pad, containing the pharmaceutical moxa extract formulation, onto the affected parts in a similar method of attaching several skin electrodes on limbs and thorax in case of writing electrocardiogram.

The present invention has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 

What is claimed is:
 1. A method of preparing pharmaceutical moxa extract tincture formulation, comprising the steps of: extracting a moxa-methanol extract by extracting from the dried young leaves of Artemisia with methanol and condensing the extract; extracting a moxa-dichloromethane fraction by suspending the condensed moxa-methanol extract in water, mixing the suspended extract with dichloromethane, distilling the mixture in a fractional distiller, and collecting the moxa-dichloromethane fraction from the lower portion of the fractional distiller with an uncollected portion remaining; extracting a moxa-ethylacetate fraction by adding ethylacetate to the uncollected portion, distilling the resultant mixture in a fractional distiller, and collecting the moxa-ethylacetate fraction from the upper portion of the fractional distiller; obtaining a dried mixture by mixing the moxa-dichloromethane fraction and the moxa-ethylacetate fraction, condensing the mixture and evaporating the condensed mixture; and diluting the dried mixture with an amount of ethanol 2-5 times relative to the weight of the dried mixture.
 2. The method of preparing pharmaceutical moxa extract tincture formulation as claimed in claim 1, wherein said step of extracting moxa-methanol extract further comprises mixing with the dried young leaves of Artemisia at least one medicinal stuff selected from the group consisting of-cinnamon cortex, dried ginger, clove, saussurea root, Korean aralia root, asarum, Angelicae Dahuricae root, orpiment, atractylis, myrrh, franldncense, akene, garlic, beeswax and sulfur.
 3. A method of preparing pharmaceutical moxa extract lotion formulation, comprising the steps of: extracting a moxa-methanol extract by extracting from the dried young leaves of Artemisia with methanol and condensing the extract; extracting a moxa-dichloromethane fraction by suspending the condensed moxa-methanol extract in water, mixing the suspended extract with dichloromethane, distilling the mixture in a fractional distiller, and collecting the moxa-dichloromethane fraction from the lower portion of the fractional distiller with an uncollected portion remaining; extracting a moxa-ethylacetate fraction by adding ethylacetate to the uncollected portion, distilling the mixture in a fractional distiller, and collecting the moxa-dichloromethane fraction from the upper portion of the fractional distiller, obtaining a dried mixture by mixing the moxa-dichloromethane fraction and the moxa-ethylacetate fraction, condensing the mixture and evaporating the condensed mixture; powdering the dried mixture; and mixing the powder with at least one diluent selected from the group consisting of Vaseline, liquid paraffim, isostearic acid, stearyl alcohol, myristyl alcohol and polyvinyl alcohol block copolymer.
 4. The method of preparing pharmaceutical moxa extract lotion formulations as claimed in claim 3, wherein said step of extracting moxa-methanol extract further comprises mixing with the dried young leaves of Artemisia at least one medicinal stuff selected from the group consisting of cinnamon cortex, dried ginger, clove, saussurea root, Korean aralia root, asarum, Angelicae Dahuricae root, orpiment, atractylis, myrrh, frankincense, akene, garlic, beeswax and sulfur. 